why the mining is done so deep into the ground

  • How Deep into Dirt Will It Go? - YouTube

     · Find out why Close. How Deep into Dirt Will It Go? DemolitionRanch. Loading... Unsubscribe from DemolitionRanch? Cancel Unsubscribe. …

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  • Should I set deck post footings deeply or use concrete ...

    Presumably there are more carefully done ones that are "post or piling" grade and less well done ones that are "landscape timber" but in many cases there's just one type in stock, take it or leave it - so you might want to look into it more and figure out when you should leave it and shop elsewhere, or special-order something different.

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  • Why mining the water on the Moon could open up space ...

     · That’s why the idea of lunar mining is so enticing. Water from the Moon could be mined, broken apart into rocket fuel, and transported to a propellant depot either near the …

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  • Solution Exchange Discussion: Roof water harvesting in ...

    I would like to respond to Vinod Chopra's estimates of the cost of RWH. In our house, here in Indore too we have implemented RWH. We have drilled five 30 cm diameter recharge bores five meters deep into the ground and filled them up with layers of gravel and sand the same, just as Vinod has done …

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  • Which type of mine often has a network of tunnels that ...

     · Which type of mine often has a network of tunnels that extend deep into the ground ... could not be dug into the ground. So tunnels were made on top of the ground …

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  • Can deep-sea mining avoid the environmental mistakes of ...

     · Can deep-sea mining avoid the environmental mistakes of mining on land? ... and they think we’re going to transport that view into the ocean, and it’s going to be ugly,” says Johnston, a ...

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  • Gemstone Mining Methods - jewelinfo4u- Gemstones and ...

     · Slope mining too has shafts but these shafts are first made slant and then parallel to the ground. Usually, this mining is done when it is not possible to make the straight shafts therefore it is named as slope mining. The tunnels are not very deep in the gemstone mining method. Using the conveyor the broken are rocks are brought out.

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  • Unit 8: Energy Resources and Climate Change

    Surface mining causes a lot of erosion problems and creates unstable ground around the spoils. Sub-Surface Mining: Tunnels/shafts dug deep into ground, coal is removed and shipped to the surface. This is the most dangerous form of mining for workers. Empty shafts are often filled in with spoils and/or slurry (mix of coal and water)

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  • How far does a ground rod need to be from the foundation?

    I need to ground an antenna strapped to my chimney, which requires hammering in a new ground rod. However, the entire side of my house is paved, meaning I can't dig it up to find the foundation footing; I'll need to drill a hole to drive in the rod. How far should the ground rod be from the side of the house so it doesn't hit the footing?

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  • How deep in the ground are the legs of the gateway arch ...

    How deep in the ground are the ... stick insect you have got but most females have to Cary there eggs round inside of them and there wait plummets to the ground so they need long legs to keep ...

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  • How Underground Mining Works | HowStuffWorks

    Shaft mining or shaft sinking is excavating a vertical or near-vertical tunnel from the top down, where there is initially no access to the bottom.. Shallow shafts, typically sunk for civil engineering projects differ greatly in execution method from deep shafts, typically sunk for mining projects.When the top of the excavation is the ground surface, it is referred to as a shaft; when the top ...

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  • Environmental Science Land Use Review Flashcards | Quizlet

    shafts are excavated deep into the ground, and networks of tunnels are dug or blasted out to follow deposits of the mineral. requires removal of the overburden Used for metals ( zinc, lead, nickel, tin, gold, copper) and coal Most dangerous form of mining

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  • Environmental Risks of Mining

    Underground mining has the potential for tunnel collapses and land subsidence (Betournay, 2011). It involves large-scale movements of waste rock and vegetation, similar to open pit mining. Additionally, like most traditional forms of mining, underground mining can release toxic compounds into …

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  • Why Mine Asteroids When We Can Mine the Deep Sea?

    Why Mine Asteroids When We Can Mine the Deep Sea? You ... few percent of the ore that miners pull from the ground. The waste goes into places like tailing ponds. ... or not deep sea mining can ...

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  • Minimum Grounding Requirements. | QRZ Forums

     · Look at the last picture. So if you need or want Radials I highly recommend the same solid, bare, tinned conductors of equal size used for the Ground Rod Radial aka Bonding Jumpers. Anyway I hope that helps shine some light on the mystery of Grounding and Bonding.For further information try reading the 3 stickies Ground Do's and Don't & Why.

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  • How Gold Is Mined | Gold Mining Process | World Gold Council

    The lifecycle of a gold mine. People in hard hats working underground is what often comes to mind when thinking about how gold is mined. Yet mining the ore is just one stage in a long and complex gold mining process. Long before any gold can be extracted, significant exploration and development needs to take place, both to determine, as accurately as possible, the size of the deposit as well ...

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  • Don't Be Concerned About Ground Bees - ThoughtCo

    Ground bees become active in early spring, and hardly sting. These bees dig nests in the ground, often in bare patches of the lawn or garden. If you find mounds of soil, similar to anthills but with larger openings, these may be ground bee nests. Watch for bees flying low over the ground …

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  • Coal mining | World Coal Association

    Coal mining is only a temporary use of land, so it is vital that rehabilitation of land takes place once mining operations have stopped. In best practice a detailed rehabilitation or reclamation plan is designed and approved for each coal mine, covering the period from the start of operations until well after mining …

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  • Deep sea mining - Wikipedia

    Deep sea mining is a mineral retrieval process that takes place on the ocean floor. Ocean mining sites are usually around large areas of polymetallic nodules or active and extinct hydrothermal vents at 1,400 to 3,700 metres (4,600 to 12,100 ft) below the ocean’s surface.

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  • High School Earth Science/Mining and Using Minerals ...

    High School Earth Science/Mining and Using Minerals. From Wikibooks, open books for an open world ... minerals have to be removed from the ground and made into the materials we need. ... Underground mining is used for ores that are deep in Earth's surface. For deep ore deposits, it can be too expensive to remove all of the rocks above the ore.

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  • How to anchor a swing set to the ground - YouTube

     · My wife and I built a heavy duty swingset from Home Depot. In this video I show the finished product, and how I anchored it for ourselves and our kids.

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  • How to Install a Copper Grounding Rod The Easy Way (No ...

     · How to Install a Copper Grounding Rod The Easy Way (No Drill) ... I show you a cheap and easy way to drive a typical 8' copper grounding rod into the ground …

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  • What Is Digging Holes in My Lawn? | eHow

     · Whether they're tiny holes or large burrows, any animal-caused damage to your lawn surely will catch your attention. Before you can attack the problem, you need to find out what type of animal caused the damage. The culprits range from harmless earthworms to destructive groundhogs or disease-causing rats.

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  • Mining Flashcards | Quizlet

    (Note that "fairly close" to Earth's surface can still mean thousands of feet deep, since Earth's crust is several miles deep.) Surface mining is what we use to obtain about 90 percent of the non-fuel minerals we extract in the U.S. Gigantic mechanized equipment removes the upper layer of soil and rock.

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  • How Coal Works | Union of Concerned Scientists

     · Hard hat-clad men and women, deep underground, working to keep America’s lights on: it’s an image burned into our national imagination. At one point, there were many hundreds of thousands of people working in the coal mining industry in the United States, often located in rural communities where mining presented the best opportunity for a ...

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  • How deep into the Earth could humans drill with modern ...

    How deep into the Earth could humans drill with modern technology? Earth Sciences. Close. 3.6k. Posted by. u/Mage98. 4 years ago. Archived. How deep into the Earth could humans drill with modern technology? Earth Sciences. The deepest hole ever drilled is some 12km (40 000 ft) deep, but how much deeper could we drill? ... What stuff is so deep ...

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  • Mining - Underground mining | Britannica

    Mining - Mining - Underground mining: When any ore body lies a considerable distance below the surface, the amount of waste that has to be removed in order to uncover the ore through surface mining becomes prohibitive, and underground techniques must be considered. Counting against underground mining are the costs, which, for each ton of material mined, are much higher underground than on the ...

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  • Mineral Extraction - The Environmental Literacy Council

    When minerals are located deep within the ground, there are a variety of underground mining methods that can be utilized for excavation. The method is based primarily on whether the mineral is soft rock (i.e., coal) or hard rock (often those containing hard metals like copper or lead), and is often site specific—taking geologic, economic, and ...

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  • Potash - Wikipedia

    All commercial potash deposits come originally from evaporite deposits and are often buried deep below the earth's surface. Potash ores are typically rich in potassium chloride (KCl), sodium chloride (NaCl) and other salts and clays, and are typically obtained by conventional shaft mining with the extracted ore ground into a powder.

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  • Coal Mining Methods - Colorado School of Mines

    the working time, because after mining advances about 20 feet, the machine is withdrawn from the face so that roof bolts can be installed to bond the strata and prevent caving. In “conventional” room-and-pillar mining, production occurs in five steps: mechanically undercutting the coalbed, drilling holes into the

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  • Why do many desert plants have roots that reach deep into ...

     · Why do many desert plants have roots that reach deep into the ground? Answer. ... to grow near the surface of the ground so the desert plant's roots may get water easily ( without going into …

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  • Coal Mining Methods - Colorado School of Mines

    the working time, because after mining advances about 20 feet, the machine is withdrawn from the face so that roof bolts can be installed to bond the strata and prevent caving. In “conventional” room-and-pillar mining, production occurs in five steps: mechanically undercutting the coalbed, drilling holes into the

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